345-65021-0 Water Pump Impeller for Nissan Tohatsu | JLM Marine

Water Pump Impeller for Nissan Tohatsu 25-40 HP Outboard Engines | OEM 345-65021-0

This high-quality aftermarket water pump impeller is designed to fit Nissan and Tohatsu 25 HP, 30 HP, 35 HP, and 40 HP outboard engines, including both 2-stroke and 4-stroke models. Engineered to OEM specifications, it ensures reliable cooling system performance and is compatible with a wide range of engine series from 1996 through 2017.

The impeller directly replaces OEM part numbers 345-65021-0, 345650210, and 345650210M, providing a precise fit for designated Nissan and Tohatsu outboard motors. It is manufactured from durable neoprene with a nylon hub for long-lasting operation in marine environments.

• Package includes: Outboard Rubber Impeller with Key/Pin
• Material: Neoprene with Nylon Hub for durability and heat resistance
• Installation tip: Lubricate with silicone grease, glycerin, or dish soap during installation (lubricant not included)

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Installation Guide

1. Disconnect the fuel line and remove the lower unit from the outboard motor following your engine's service manual.
2. Remove the water pump housing cover to access the old impeller. Take note of the impeller blade orientation.
3. Extract the old impeller and key/pin carefully; inspect the pump housing for debris, scoring, or corrosion.
4. Clean the housing and shaft thoroughly with a suitable marine cleaner to remove salt deposits and residue.
5. Lubricate the new impeller generously with silicone grease, glycerin, or dish soap to ease installation and prevent blade damage.
6. Insert the key/pin into the drive shaft slot and align the new impeller blades in the correct rotational direction.
7. Slide the impeller onto the shaft gently, rotating it as needed to allow blades to compress into the housing.
8. Reinstall the pump housing cover and gasket, ensuring all fasteners are torqued to manufacturer specifications.
9. Reattach the lower unit to the engine, aligning splines and shift linkage carefully.
10. Reconnect the fuel line and water inlet, then test the cooling system by running the engine in a test tank or on muffs.
11. Check for steady water flow from the tell-tale outlet within 15–30 seconds of engine start.
12. Inspect all seals and connections for leaks, and verify normal operating temperature before returning to service.

Frequently Asked Questions

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend annual replacement or every 200–300 hours of operation, whichever comes first.

Q: What are the signs that my impeller is failing?
A: Common symptoms include weak or no water discharge from the tell-tale, engine overheating, steam from the powerhead, or reduced cooling performance.

Q: Can I install this impeller dry?
A: No. Always lubricate the impeller with silicone grease, glycerin, or dish soap before installation to prevent blade damage.

Important Notes

• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.
• Verify that the product images and specifications match your original part before purchasing.